以下主张和观点，符合可持续发展思想的是[ ] A、可持续发展就是实现经济持续增长

一级物业管理企业的注册资本为( )。

A．500万元

B．50万元

C．300万元

D．100万元

FDIC《土木工程施工合同条件》规定，在( )之后，即不应对履约担保提出索赔。

A．发出工程移交证书

B．工程竣工结算

C．发出缺陷责任证书

D．最终结算

叉虫益雌雄异形。雄虫体极小，幼时生活在（）咽部，后转寄生在肾管或体腔等处。

A、雄虫

B、雌虫

C、雄虫成虫

D、鱼

下列关于短期融资券的说法，错误的是( )。

A．发行主体为包括证券公司等在内的企业
B．发行对象为银行间债券市场机构投资者
C．证券公司短期融资券的期限最长不超过91天
D．收益率比央行票据和短期国债低

The questions in this group are based on the content of a passage. After reading the passage, choose the best answer to each question. Answer all questions following the passage on the basis of what is stated or implied in the passage.

Although hard statistics are difficult to come by, there is substantial anecdotal evidence that use of performance-enhancing drugs, or doping, is rampant in professional sports. Of perhaps greater significance to society are the estimated 1.5 million amateur athletes who use steroids, either to improve their appearance or to emulate the performance of their favorite professional athletes. This chemical epidemic is a pernicious threat to both the nation’s health and our collective sense of "fair play."

Nonprescription anabolic steroids have been illegal in the United States since 1991, and most professional sports leagues have banned them since the 1980s. These bans are partly a matter of fairness--a talented athlete trained to the peak of her ability simply cannot compete with an equivalent athlete using steroids--but also based on issues of health. Anabolic androgenic steroids ("anabolic" means that they build tissues; "androgenic" means that they increase masculine traits) have been linked to liver damage, kidney tumors, high blood pressure, balding, and acne. They function by increasing the body’s level of testosterone, the primary male sex hormone. In men, this dramatic increase in testosterone can lead to the shrinking of testicles, infertility, and the development of breasts; in women, it can lead to the growth of facial hair and permanent damage to the reproductive system. Steroids have also been linked to a range of psychological problems, including depression and psychotic rage.

The punishments for getting caught using steroids are severe, and the serious health consequences are well documented. Despite this, millions of professional and amateur athletes continue to use performance-enhancing drugs. Why is this

One clear pattern is that many athletes will do whatever it takes to get an edge on the competition. Since the 1950s, Olympic athletes have played a cat-and-mouse game with Olympic Committee officials to get away with doping, because the drugs really do work. Athletes who dope are simply per and faster than their competitors who play fair. Professional athletes in football and baseball have found that steroids and human growth hormone can give them the edge to score that extra touch-down or home run, and in the modern sports market, those results can translate into millions of dollars in salary. For the millions of less talented athletes in gyms and playing fields across the country, drugs seem like the only way to approach the abilities of their heroes in professional sports.

The other clear pattern, unfortunately, is that it has been all too easy for abusers to get away with it. Steroid abuse is often regarded as a "victimless crime." One of the favored ways to trick the testers is to use "designer" steroids. There are thousands of permutations of testosterone, such as THG, that can be produced in a lab. Chemists have discovered that they can create new drugs that produce androgenic effects but do not set off the standard doping tests. Other methods have been to use the steroids but stop a few weeks before testing, to use other chemicals to mask the traces of steroids, or to switch in a "clean" sample of urine at the testing site. Other athletes use steroid precursors, such as androstene-dione, that have androgenic effects similar to those of steroids but are not illegal because they are not technically steroids. The sad fact is that unless the government and professional sports organizations are willing to get tough on the steroid problem, the use of performance-enhancing dugs in sports is not going to end.

What appears to be the primary purpose of this passage ？（）

A. To educate readers about the health threats involved in the use of performance-enhancing drugs

B. To analyze the ways in which professional athletes have eluded attempts to screen for performance-enhancing drugs

C. To discuss the reasons why performance-enhancing drugs are a dangerous and persistent problem for society

D. To complain about the inadequate efforts by government and professional sports organizations to eliminate the problem of performance-enhancing drugs

E. To argue that athletes, both professional and amateur, should not use performance-enhancing drugs on the grounds that they are both dangerous and unfair